How Computers boot up


	How Computers boot up
Djiezes
7-17-2008 4:36 PM
281 views
tags:
computers, boot, booting, kernel
Djiezes says:
This extensive 3-part post focuses on the linux booting process, from motherboard & chipset to the bootloader & kernel booting process.
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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/c83e14f6-037a-48b8-9525-b53dc6942a8d/7F4498C8-CE57-4EEC-9CC2-B08F68289E76/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://duartes.org/gustavo/blog/post/motherboard-chipsets-memory-map" href="http://duartes.org/gustavo/blog/post/motherboard-chipsets-memory-map" style="font-size: 11px;">duartes.org</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://duartes.org/gustavo/blog/post/motherboard-chipsets-memory-map"><H1><A rel="bookmark" href="http://duartes.org/gustavo/blog/post/motherboard-chipsets-memory-map">Motherboard Chipsets and the Memory Map</A></H1></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://duartes.org/gustavo/blog/post/motherboard-chipsets-memory-map"><P> To start off let’s take a look at how an Intel computer is wired up nowadays.  The diagram below shows the main components in a motherboard and dubious color taste: </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://duartes.org/gustavo/blog/post/motherboard-chipsets-memory-map"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/duartes.org/img/7E221D97-6DB5-4313-90D8-A1F14619D3B1" alt="Diagram for modern motherboard" /></div></blockquote><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content7.clipmarks.com/images/clip-icon.gif" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://duartes.org/gustavo/blog/post/how-computers-boot-up" href="http://duartes.org/gustavo/blog/post/how-computers-boot-up" style="font-size: 11px;">duartes.org</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://duartes.org/gustavo/blog/post/how-computers-boot-up"><H1><A rel="bookmark" href="http://duartes.org/gustavo/blog/post/how-computers-boot-up">How Computers Boot Up</A></H1></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://duartes.org/gustavo/blog/post/how-computers-boot-up"><div align="center"><img src="http://content8.clipmarks.com/blog_cache/duartes.org/img/7555319D-4B53-42CC-8D42-7D52F876DEE2" alt="Boot Sequence Outline" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://duartes.org/gustavo/blog/post/how-computers-boot-up"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/duartes.org/img/4C984446-D84A-49AC-93E8-7F6E7F59F5C7" alt="Master Boot Record" /></div></blockquote><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content6.clipmarks.com/images/clip-icon.gif" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://duartes.org/gustavo/blog/post/kernel-boot-process" href="http://duartes.org/gustavo/blog/post/kernel-boot-process" style="font-size: 11px;">duartes.org</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://duartes.org/gustavo/blog/post/kernel-boot-process"><H1><A rel="bookmark" href="http://duartes.org/gustavo/blog/post/kernel-boot-process">The Kernel Boot Process</A></H1></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://duartes.org/gustavo/blog/post/kernel-boot-process"><div align="center"><img src="http://content7.clipmarks.com/blog_cache/duartes.org/img/89E1802F-0810-4B7A-90F4-016F060E0FAB" alt="RAM contents after boot loader runs" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://duartes.org/gustavo/blog/post/kernel-boot-process"><div align="center"><img src="http://content8.clipmarks.com/blog_cache/duartes.org/img/47F0BF9E-CB4D-4BFF-8385-A0C0DD3DDD7A" alt="Architecture-specific Linux Kernel Initialization" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://duartes.org/gustavo/blog/post/kernel-boot-process"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/duartes.org/img/77FB4020-5668-4F1C-B534-215B6D0033AE" alt="Architecture-independent Linux Kernel Initialization" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://duartes.org/gustavo/blog/post/kernel-boot-process"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/duartes.org/img/BC75C8F3-7B58-44C6-BFA1-BA4F92C2C269" alt="Windows Kernel Initialization" /></div></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/7F4498C8-CE57-4EEC-9CC2-B08F68289E76/blog/" title="blog or email this clip"><img src="http://content7.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>
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